Because an HVAC system is one of the most costly expenditures you can make, you'll want to gather as much information as possible when you believe it's time to buy a new unit. Over half of all air-conditioning systems are acquired as an afterthought, which might result in the purchase of the incorrect system for your needs. FACT HVAC presents you with the top five questions you should ask before installing an HVAC system in your house. Not only will these questions help you save money, but…